"We are always interested in quality players and when a player of Matt's pedigree unexpectedly became available we moved quickly."

Potter does not take up office at Odsal until 15 November after seeing out his contract with St Helens, who he guided to two consecutive Grand Finals.

But the Bulls have already signed nine new players as they bid to turn things round after missing the Super League play-offs for the second successive season.

"It's exciting times," Diskin told BBC Radio Leeds. "They've got a new group of players and a lot of depth to the squad and some new coaches, so it's an exciting opportunity and I'm looking forward to it. Hopefully I can play a big part in the Bulls' revival."

"I have no doubt Matt will play a key role in the Bulls revival," said Leeds Rhinos chief executive Gary Hetherington. "Matt has been one of our core players, who has been at the heart of the Rhinos' success over the past decade.

"But we are fortunate to have two outstanding young hookers in Paul McShane and Liam Hood who aspire to follow in Matt's footsteps."

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